Research for Determine the Best Soil Sampling Space in Precision Agriculture by Fractal and Soil Statistic Means

Soil fertility is the ability of soil supply and harmonize the moisture, nutrient, air and quantity of heat needing by the plant developing, it occurs change continuously along with environment condition changes and the influence of agriculture yield action. The dynamic change of soil fertility which sampling and analyzing timely corresponding with the crop demands will be propitious to steady yield and high yield of crops. Through serried sampling of test field soil, to determine the content of N, P, K and OM. Using the theory and methods of classical mathematical statistics, soil statistics and fractal means, to analyze the changing rule of datum, and determine the most sampling space that reflecting spatial variability of soil fertility distributing with enough accuracy.